11.Be aware of：意识到.

　　I like people who are going about their daily business without being aware of the camera(1997-1)

　　12.Behind the schedule/late

　　13.Be in charge of：负责，照顾，经管 be responsible for

　　14.Be in the charge of：下级+be in the charge of+上级

　　15.Be in season：应季的，当令的

　　These apples and pears seem to be in season.(1995-6)

　　16.Be supposed to do：应该，被期望

　　What am I supposed to do with his help?

　　17.Book up

　　Break down/doesn’t work

　　18.Bring up：教育，培养，提出

　　She brought up her children to be truthful.

　　19.Build up积累，增强，树立

　　20.By chance/run into：偶然